Thread-cutting device for sewing-machines.



'12. H. A. HABBERT & J. L. ALLEN.

THRBAD OU'ITING DEVICE FOB. SEWING HAUHEIIEB.

nrmu'rmn FILED mun. a, 1906.

924,768; Patented June 15,1909.

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In Q A E I d h @g WITNESSES: IN VENTORS ATTORNEY.

E. H. A. HABBERT & J. L. ALLEN.

THREAD CUTTING DEVIGE FOB SEWING MAGHINES.

APPLIUATIOK FILED HAKB, 1906.

1 mm w M m .1 1% t fi/ m w W P 5 m 8 WITNESSES.-

A TTORXE Y.

UNITED STATES ENNO HENRY AUGUST HABBERT AN 1) JOHN LEON ALLEN,

BY MES'NE ASSIGNMENIS, TO THE SING ER MA OF NEW JERSEY.

PATENT OFFICE.

OF TROY, NEW YORK, ASSIGNORS, xummnnmo GOMPANYKA CORPORATION THREAD-GUTTING' DEVICE FOR snwmmmwnnma.

Specification of Letters Patent.

Yatentilune in, 1909.

Application file l lamb 6,1906. semi 210. $04,005

To all whom it may concern:

Be it known that we, ENN H ENRY AU- GUST HABBER'I and Jon: LEo ALL'E'n', nit

Zens of the. United States, and rosidontuaol' Troy, in the (minty of .l-imiaseii im' and Stain 0E New York, have inv'ei'itei'i (ana'bain new and useful Improvements in 'll1read-(Juiting Dovices for Sewing-Niswhines, of which the fnb lowing a specification.

()ur nvention relates. to improiiements in thread-cutting damages for sewing machines,

am'lhas for its object to provide simple and effective means for first sevo'rmgimid than. securmgiho free ends of the sewing threads, and later Bowling the free. and oi llifinfledlfi tlire nd not consuu erl in the formation: of the partially in section,-

chine; as is neoessary first stitch oftlie series of min-hog nextto be made.

For no purpose of. iilustpa'tion we have shown our imfntion as applied to the bufltonsewing machine commercially kuowi'i-as the Union, but we Wish it to be understood that our invention is app'iic ajble to sewing nmciiines forotiierjpnrposes', I

In the accompanying drawings i llustra,ting' our. invention, in the severai figures of which like parts are similarly zlesignaiorl, Figure 1- is a iew in front and elevation of a, nation'- sewing maohineequippedwith our improvo'ii' mechanism; Fig '2 a, from? side; eleven Linn of the front of the overhanging arm and'bcd ii-ihte of the sewing-inaol'iinof, Pig. 3 annndersirioview' oi .so mucliof the bed-platepf the sow.ing g-r 'uaito; illustrate this wee-1h anismifor continuing the action of the! loop engaging finger; Fig; im lmi' View of the f-l ontendi portion nf "tho bgi-yla'te below line X, X, Fi 1; Fig. 5 an underqside the noedleethread looped around @119 iconen'gagingfinger; F'g.

5r showing the loo ba ok on}; oiling: with the neqdlo ac'tunbion wonksiippori and l 11- a i'iew in. perspeotive 0f the undersuie {and portion vi'oin of i the throat-plate 01' work-snpporh showing 6 a view siniilair' to Fig; engaging finge'r' moved 81a viwfiiifseciion on tho I of hill? work-support, loop-iengnging and tlireaxkouiter, the loop-engaging finger shown in sul'itnnt-ially tze game position as in Figs. 6 and 8. i

In, describing our iimitod reference will be mmleto the usual .woll-known parts of the bnttdnfisewing ma improvements, only suvh chine as is deemed necessary for!!- prop'erunderstamlin? of our invention;

1 is the rame or bod-plate oi the sewingi usual segmen'trley' er (not;

znitting, through the needle; i gate, latra'l movementsltoth niaedlo: E '14 a work-holderpf any appr ovecl con struction, which, in tli prosent inst-anee, is provided-with the buttonjnws 1.5, tonmtop l7 and buttonplate '18 The link 1'9, with the iower emlof t-hepressevbflr 5, which hitter is provided Wiili an adjustable and iiio upper hai'i-ng of the sen who-g1 Hie usual pressepbm n' irar 1110121112 3 '2 V i spring (not, shown}. Upon 9; pin 21, secured l i I I l I l I I i i i i I in :1. suitable lu'g 22?,foruied ori the headiof the \*=ov i3i nging arm, a war 23, one end of which bears against the underside of iii egdjnsi-nble .collar '20, its onpoi iie and 13-3. oi' nneciied, by a suitable clnun as 25, with a suitable foot -treadle (not shown which, when ires'ed down, 23, tinougl'iits notion upon t-heqollar 2D, to mise the p'ressenbai" in opposition to the resiliency of the pressvwbar spring, thus, causing-div \vork-hohler14in raise the. jaws causes the lever;.

work-homer 14 isconneoted bfanuitable nolia '20, shown in dottiidklinesxonly, bi

ii pivntally mounted w I5, 16, up from tho bnitomplatoi1S 1 nd,.

stance, is actuated to present the button to the action of the stitch-forming 1110Cl'lttIllSlll in the same manner as in the button-sewing machine (Union) previously referred to, and

comprises the rock-shaft 31 mounted in bearings 32, 32, formed on the underside of the bed-plate, the front end of said shaft opcra tively connected, through the adjustable lug 33, with the lower member 3401 the workholder, the member 34 being slidably mount- U 1011 the,

spring so as to hold the rock-shaft with the adjustable sto 37 pressed a ainst the hearing surface 38 ormed in the ri 39 of the bedplate, which is the position of the several parts for the placing of the stitches in the two back holes of tho'button or the position for sewing bar or two holed buttons.

When it is desired to adapt the machine to the sewing on of four holed buttons, the

adjustable collar 40, mounted on the rock shaft 31, is adjusted to the position shown in Fig. 3, which brings the finger 41 in the range of travel ofthe end 42 of the lever 43 mount ed on a stud 44 secured in the bracket 45, which bracket is attached by screw 46, to the underside of the bed-plate of the sewing machine. To effect the actuation of the lever 43, its end 47 isprovided with a stud 48 and roller 49, which latter, in the operation of the machine, contacts with the wall. 50 of the cam 51 carried b the gear 52 (shown in dotted lines only, ig. 3) which in turn meshes with a worm gear 53 secured on the hook driving shaft 9, said gear and cam being mounted upon a stud 54 secured in a plate 55, which latter is secured by screws 56 and 46 to the underside of the bed-plate. When the roller 49 is opposite the small diameter 57 of the cam 51, the rock-shaft 31 is held, by the torsion of the s ring mounted on the rear or back end of sait shaft, in the position illustrated in Fig. 3, but when the roller 49 is acted upon by the cam portion of the cam 51, the lever 43 is rocked upon its fulcfiun 44, causin its end 42 to contact with the finger 41an rock the shaft 31 in a direction opposite to that controlled by the s )ring mounted u on said rock-shaft, thus a justing the wor -holder to the osition required for sewing through the two oles nearest the operator.

59 is a plate, secured by screw 60, in suitable g'uideways 61 formed in the front end of the bed-plate 1. To the underside of the plate 59 are secured, by screws 62, two op- .positely arranged uideways 63 and 64, be-

tween which is sli ably mounted the'loopengaging finger carrier 65, to which latter is secured, by screws 66 and 67, the loop-engaging linger 68. The carrier .65 is cut away at its upper side for a portion of its length and wh th, as indicated at 69 and 70, Figs. 1 and 2, for lightness of construction and convenience of attaching the loop-engaging finger 68. The carrier 65 is provided with a boss or hub 71 into which is threaded a screw 72, and upon the latter is pivotully mounted one end of a connection 73 ai'ljustably secured to a second connection 74, the opposite end of which is pivotally attached to the end 75 of the lever 76, the opposite end of the lever 76 pivotnlly mounted upon the stud 44 and at t 1e underside of the lever 43. The

adjustments of the connections 73 and. 74,

relatively to each other, are controlled by the screws 77 which pass through a suitable washer 78 and slot 79, the latter formed in the connection 74, and the screws threaded into the connection 73.

86 is a cam adjustably secured, by screws 81, 81, to the underside of the cam 51 the cam 80 being formed with concentric portions 82 and 83, cam portion 84 and cam notch 85, which latter, together with the cam portion 84, acts to control, through a stud 86 adjustably mounted in a slot 87 in the lever 76 and roller mounted on said stud 86, the movements of the lever 76 in opposition to the resiliency of the spring 7 6, which lever in turn transmits, through the connections previously described (71 to 74, both inclusive), the movements of the loop-en-.

gaging finger 68 necessary to hold and sever the needle-thread at the desired time, relatively to the formation of the series of stitches, as will be later more fully pointed out. a

88 is an arm extending downwardly from the lever 23 and connected at its lower end, by a screw 89, to a connection 90, which in turn is attached, by a screw 91, to a lever 92 pivotally secured on the underside of the ack slide plate 93 by a stud 94 secured by a collar 95. To the forward end of the lever 92 is secured, by screws 91 and 96, a threadengaging finger 97 provided with a notch 98.

'When the lever 23 1S rocked, through the ac tion of the foot treadle, upon its pivot pin 21 to raise the work-holder 14 away from the button-plate 18, the lever 88, through the connection 90, will move the lever 92 inthe ton-plate 18, see Fig. ;10,where. it is held for the commencement" of the next series of stitches e 103 is aathread-nipping lever fulcrumed u on a stud (not shown) formed upon the p nch collar 1 -04 which latter issecu'red, by the; inch'sc'rew: 1l)45,1 onthe-presser-bar 5,

screw 106. 'The' ever-103 is provided with two oppositely arranged arms 107 and 10S,- th'elatter connected with one-end of a spring 109'; sthe ,1 oppositeendofsaid spring bei-n 110, to the head 'Ihe'a'rm 107 ex- 111. formed in a a'serew 113, to the cad or the/ overhangconnected, through a wire of the overhanging arm. tends through an opening bracket-1112 secured, b

lower-front face of the l.0,3,.;is sec-urcdfby, ascrew 114, a thread-em gaging'wirc 1115. which, when the qprsserbar 5 raised, is swung, through the connectin'g parts J-03to' 11 5;-both inclusive, in contact "witht e" needle thread, extendinig throjighthe needle eve and intothe materiaandastheneedle-thread is severed from below-lthejowork support the wire 115, throug-h the'ao'tion of-the spring 109,* draws the loose e inclined surnori nal positi'o'nfr r n F While?!- the present two-part construction 4 oft-the lave-15103 and wire 115 isdesirable, it is evident that-they could beforme'd so as to constitute a single piece and perform the reiiirdfuncti'o'nsequallyaswell. To the un- 5 ersiiliif the work-sun) ortfi is attached, be screws 117 and 118; a" lock' 119'and threac "cutt Qtijaghinstthe edge 121 of which the ngaging fingcr fiti, m its backward or iiiovement; severs "t-trqxlz? l i sme ter 3 is provided with-e threada iiil lie H a at to :11 any {tension it teaser-tee Makeu 2 as of th'elithfrcad s til "hi-1h" t? .e shcedle thiailf a gaiinst its 'aci ideii'i 1 drawn oul'Pfdi" the eye of he needle. and to give to the needle-thread the. ever "103 heinv held-upon said stud bya free end '131 between the ins; arm-{and to the lower end of the lever drawn from the s thread b its passin erid' o'f needle thread up through the material Iiiol!thewbutton-jaw :16; where it s etween the wire 115 and the surface f ll fivuh-tfl theisucceeding button has beenpositioned-in the button-jaws when, as the wo'rlc hblder'is lowered, the lever-103 and its atta"che'tl- Wire-"1 15 are returned to their needle thread from being drawn out of the the doose end of.

a slight tension on the needle side of the take-u and by mounting the thread-check upon t \e needle-bar the thread is during the stitching operation, held in a substantlallj" straight line between the needle eye and the thread--check, avoiding the possibility of the needle-thread getting in-line V with the de-' scending needle.

125 is a tens on releasing lever mounted to oscillate on a pi'votscrew 126 secured in'the faceplate 127 of-the overhanging arm 2, and to said lever 'is adjnstably secured, by; a

screw 128, a lug 129. As thepresser-bar is raised the screw 130, which acts to secure the collar 21) dn the presser-bar-5, contacts with the loweredge or-wall of the lug 129, thus rocking the lever 125 sufficiently to -force its tension disks 132 and 133. 1

134 is a thread drawing lever mounted upon-a screw 135 secured 1n theface plate 127, said'thread drawing lever at its free end bein provided with an opening 136 through whic the needle thread passesin its travel from: the tension 26 to the thread controller 28, the thread after leaving the'opening 136 passing behind a wire 137, so that, -as the ever 134 is moved by the lug 1.38 of the lever. 125- acting against the wall 1138f of the lever n 134, as when releasing the tension, thread is 001 through the open ten-- The 'riction produced upon the through the eyeof-the needle, tv e threat -c eck mounted upon the needle-bar, the take-up andthe thrcadcon troller gives to the thread sufficient resistance to cause the action of the thread drawing lever 134 to drawfrom thc-spool suffi cient thread to prevent the free end of the sion disks.

e e of the needle as' the needle-descendsin t e formation of the first stitch of the series. 139 is a springsecured' at one end of the face plate 127, its opposite end secured-to the lever '134, said "spring acting to hold the thread drawing lever in its normal position, secFi-g. 1, when not actuated by the movements of the tensionreleas'ingi lever 125..-

140,i s the usual hook cap ring, .1141 thehookca screw and 142 the bobbin-case stop. The Y u'tton-sewing machine herein illustrated and described is'equipped with a suitable stop motion mechanism; but as such mechanism-is commercially old andwell under-stood; and as it forms no art of our hiresent invention-,1 We ave not lit pecg s; d s btr m dflss h than ahmume'thatjthe needle s! reaching t jsi i m d -1 it'h s srwe aie the! 1% s m -s e a:simapmhseases; v the take-fink r i inbfll llkfim dl h @lif lidiidllilfl' ml sm ntafi-eeen Me sing. secnmdstn theil'cis t fir 18 2 11 3 1% gg; ti'on Vi the springjlfi' suddenly to, tha hotrtom rotation being timed to resent the notch 85 to the action of the re] er, at the time the finger 68 is to enter the thread loop, thus, through the connections previously described, carrying the free end of the loop-engaging finger 68 intothe loop of needle-thread, the continued upward. movement of the take-up causing the needle-thread to be looped about the finger 68 as shown in Fig. 5, at which stage in the operation of the stitch-forming mechanism the stop-motion mechanism is automatically operated to arrest the action of the machine.

After the machine has been brought to rest by the action of the stop-motion mechanism, leaving the parts in the positions above described, the operator, through suitable connections leading from the foottreadle, raises the work-holder 14, thus causing the needle-thread to be drawn tight around the finger 68, and as the clamp is raised to its. highest position the needlethread 'is broken or severed by drawing it against the back edge of the finger 68 and to insure that the thread will be severe at this point such edge 68 is shar ened, as shown in Fig. 7. The raising of t 1e work-holder 14 also causes the thread engaging finger' 97 to be moved, as previously described, across the path of vertical movement of the needle, thus causing the bobbin-thread to be severed by the cutting edge 101 of the cutter-blade 100, and as the finger97 is returned to its normal position it carries with it, owing to its havin passed'to the front side of the needlethre during the cutting operation, the loose end of bobbin-thread, causing it to be sitioned and held betweenthe upper surace of the work-support and the lower side of the button-plate 18, and this same vertical movement of the work-holder permits the thread-np ing lever 103 to be swung, by the action of t e spring 109, on its pivot sufficiently to carry the thread engaging wire 115 against the inclined surface 116 o the but ton-jaw 1-6; but ifthe needle-thread has not been severed, through the action of the workholder, at such time asthe wire 115 is to pass the path of vertical movementof the needle, the wire, due to its spring control, will rest against the needle-thread until it 1s severed and then carry the free end of the needlethread over anda ainst the inclined portion 116,-where it is he (1 during such time as the .work-holder is held in its elevated position. After the work-holder has ben lowered the machine is started, the first}; descent of the needle is throughwhe opening 143 in the finger 68, and as the needle returning, in its upward stroke the roller imounted upon the stud86 rides the wall 144 191 the notch 85 to the concentric portion 82, and doing so causes the finger 68, through suitable conne'ctions reviously described, to be moved backwar carrying the finger 68 out of line with the needle path, and in doing so draws the free end of the needle-thread below the work-support and'n'ips it between the underside of the bracket 119 (see Fig. 6) and the upper side of the loopengaging fin 'er 68. The further rotation of the cam 80, t rough the continued operation of the machine, brings the inclined or cam portion 84 in contact with the roller mounted on the stud86,

causing the finger to be moved to the limit of its backward stroke, and in doin s0 savers the loose end of needle-thread by ringing it into contact with the cutter 120, which conipletes the action of the several parts for effecting the severing and the holdin of the sewing threads for the sewing on of a utton.

1. In a thread-cutting device for sewing machines, a thread-cuttin blade and a loop engaging finger located elow the throatplate of the sewing machine, said loop-engaging finger provided with a cutting edge for severing the needle-thread, and an opening for the passage of the needle, and o eratively connected with the actuating mec anism of the sewing machine and actuated by said mechanism to coact with said thread-cutting blade to sever the free end of'the needlethread.

2. In a thread-cutting device for sewing machines, a thread-cutter, awork-holder and a loop-enga ing finger, said loop-engaging finger provi ed with a needle opening and a thread-cutting edge, said thread-cutting edge acting, through the manual manipulation of the work-holder, to sever the needle-thread below the worksupport, in combination with means, including a cam for moving said loo engaging finger in contact with a suitabliv mounted thread-cutter, for severing the free end of needle-thread.

3. A thread-cutting device for sewing machines comprising a work-support, a loop-engaging fi er rovided with a outtin edge, and a wor -ho der, said work-holder ocated above the bed-plate of the sewing machine and adapted to be manually operated to lift the work vertically away from the worksupport and cause the needle-thread to be severed by drawing it over the cutting edge of the loop-enga ing finger.

4. In a thread cutting device for sevn'ng machines, 'a main drive-shaft, a work-support, a loop-engaging finger, a stationary thread-cutter having a cutting ed e located below and separated from said wor -support, and means, including a cam, in driving relation with said main shaft for moving said loop-engaging finger with respect to said thread-cutting edge, whereby the free end of the needle-thread is severed from the material below said worksnpport during the stitching operation.

5. In a thread-cutting device for sewing machines, a work-holder, a tension releasing button-plate, a thread-engaging finger and of the needle to cause the thread-cutter to sever the bobbin-thread, the return movement of said finger causing the loose end of bobbin-thread to be carried back over the work-Sn port and yieldinglyvheld between said wor -support and button-plate;

6. In a threadcutti'ng device for sewing mechanism, manually operated means for effecting the vertical movements of said workholder, a thread-cutting device located above the work-plate of the sewing machine, a thread-cutting device located below the work-"plate of the sewin machine, a needle'-. 'threa tension carried y the needle-bar, a thread drawing lever operated through the movements of the tension releasing mechanism and a thread gripping device operatively connected with the manuall means for effecting the vertica movements of the work-holder, in combination with automatiemeans for severing the loose end of needle-thread not consumed in the formation of the first stitch of the series-next to be made.

' 7 In a thread-cutting device for sewing machines, a work-support, a work-holder,

.manually operated means for efiecting the vertical movements of said Work-holder, a thread-cutter located above the work-support,- a thread-cutter located below the worksupport and a thread-tension carried by the needle-bar, said thread-tension yieldingly controlled to at all times frictionally control the passageof the needle-thread in combination with a ,pivotally mounted oscillatin thread holding lever operatively connecte with the manually controlled means for raising the work-holder, and yieldingly controlled in its movement across the path of the ver controlled tical movement of the needle, and means having a surface for coactin with said lever for holding the needle-threa 8. In a thread-cutting device for sewing machines, a work-support, a Work-holder, manually operated means for efi'ectin the vertical movements of said work-hohfiar, a needle-bar provided with a tension device and a loop-engaging fin er around which the needle-thread is loope and by which the needle-thread is severed by raising the Workholder, in combination with an oscillati thread-holdin' lever operatively connect dd with the mec ianism for raising the workholder, and provided with yielding means for moving said lever across the path of vertical movement of the needle.

9. In a thread-cutting device for sewing machines, means, including a work-support, a cutter blade, a manually operated workholder provided with a button plate, and a loop-engaging finger, said finger acting to hold the needle-thread in opposition to the manually controlled movements of the workholder automatic means for actuating said finger to draw the free end of the needlethread below said work-support and in contact with the cutter blade, and severing means having a cutting edge located above the under surface of the work-support, the return movement of said severing means delivering the free end of the bobbin thread below the button plate of said work-support where it is held for the commencement of the series of stitches next to be made.

Signed at Troy, in the county of Rensselaer, and State of New York this twentyfirst day of February A. D. 1906.

ENNO HENRY AUGUST HABBER'T. JOHN. LEON ALLEN. Witnesses:

. RANSOM H. GILLET,

MARGARET MCLAUGHLIN. 

